Like many other Cowon o2 users, I have experienced syncing issues when watching video on my o2 where the audio and video don't match up. I have tried multiple DVD to mp4 converter programs as well as the MediaCoder program with the same results-some movies would play with no issues, others with the audio out of sync. I then noticed that ALL of the movies that had sync issues were sourced from Paramount and 20th Century Fox DVDs. I'm curious if this is just a coincidence or if other forum members have had the same experience with certain DVD source material.